Seishi Kishimoto(岸本 聖史Kishimoto Seishi, born November 8, 1974) is a Japanese manga artist and the younger twin brother of Masashi Kishimoto (creator of Naruto). Seishi created the manga 666 Satan, which was serialized in Japan by Monthly Shōnen Gangan and licensed by VIZ in North America as O-Parts Hunter. In 2008 he launched a new manga titled Blazer Drive in Monthly Shōnen Rival magazine.